<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF-8">
    <title>武理天协</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            margin: 0;
            padding: 0;
            background-color: #f0f0f0;
        }
        .header, .footer {
            background-color: #202040;
            color: white;
            padding: 10px 20px;
            text-align: center;
        }
        .container_a {
            padding: 20px;
            margin: 15px;
        }
        .container_b{
            padding: 20px;
            margin: 15px;
        }
        .container_c{
            padding: 20px;
            margin: 15px;
        }
        .link-item_a {
            display: block;
            background-color: white;
            margin-bottom: 20px;
            padding: 20px;
            border: 2px solid #ccc;
            border-radius: 8px;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
            text-decoration: none; /* Remove underline from links */
            color: black; /* Standard text color for content */
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            position: relative;
        }
        .link-item_a:hover {
            transform: scale(1.05);
            box-shadow: 0 10px 20px rgba(0,0,0,0.3);
        }
        .link-item_b {
            display: block;
            background-color: white;
            margin-bottom: 20px;
            padding: 20px;
            border: 2px solid #ccc;
            border-radius: 8px;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
            text-decoration: none; /* Remove underline from links */
            color: black; /* Standard text color for content */
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            position: relative;
        }
        .link-item_b:hover {
            transform: scale(1.05);
            box-shadow: 0 10px 20px rgba(0,0,0,0.3);
        }
        .link-item_c {
            display: block;
            background-color: white;
            margin-bottom: 20px;
            padding: 20px;
            border: 2px solid #ccc;
            border-radius: 8px;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
            text-decoration: none; /* Remove underline from links */
            color: black; /* Standard text color for content */
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            position: relative;
        }
        .link-item_c:hover {
            transform: scale(1.05);
            box-shadow: 0 10px 20px rgba(0,0,0,0.3);
        }
        .image_a{
            display: none;
            background-color: none;
            width: 236px;
            height: 800px;
            background-image: url("images/5.webp");
            background-repeat: no-repeat;
            background-size: 100%;
            position: absolute;
            right: 0px;
            top: 0px;
        }
        .link-item_a:hover>.image_a{
            display: block;
        }
        .image_b{
            display: none;
            background-color: none;
            width: 266px;
            height: 900px;
            background-image: url("images/6.webp");
            background-repeat: no-repeat;
            background-size: 100%;
            position: absolute;
            right: 0px;
            top: 0px;
        }
        .link-item_b:hover>.image_b{
            display: block;
            object-fit: contain;
        }
        .image_c{
            display: none;
            background-color: none;
            width: 223px;
            height: 183px;
            background-image: url("images/3.jpg");
            background-repeat: no-repeat;
            background-size: 100%;
            position: absolute;
            right: 0px;
            top: 0px;
        }
        .link-item_c:hover>.image_c{
            display: block;
            object-fit: contain;
        }
    </style>
</head>
<body>
    <div class="header">
        <h1>天文网站区</h1>
    </div>

    <div class="container_a">
        <a href="https://www.nasa.gov" target="_blank" class="link-item_a">
            <h2>NASA 官方网站</h2>
            <p>访问美国国家航空航天局（NASA）的官方网站，探索宇宙、太空任务和最新科学发现。</p>
            <div class="image_a">
            </div>
        </a>
    </div>
    <div class="container_b">
        <a href="https://www.eso.org" target="_blank" class="link-item_b">
            <h2>欧洲南方天文台 (ESO)</h2>
            <p>了解欧洲南方天文台的创新项目和对天文研究的重要贡献。</p>
            <div class="image_b">
            </div>
        </a>
        
    </div>
    <div class="container_c">
        <a href="https://www.space.com" target="_blank" class="link-item_c">
            <h2>Space.com</h2>
            <p>获取关于宇宙的最新新闻和详细的科学报道。</p>
            <div class="image_c">
            </div>
        </a>
    </div>
    <div class="footer">
        <p>联系我们: email@example.com</p>
    </div>
</body>
</html>